There are a number of similar open-source efforts both in, and related to MPI. Below is a non-exhausive list of some helpful pages. If there are any missing resources, please reach out so we can add it.
https://github.com/MagneticParticleImaging This page contains a number of software projects including nanoparticle dynamics, reconstruction, data, and simulations.
https://github.com/gBringout/CoilDesign This is an open-source coil design program
Open Source Imaging This is a primarily MRI open source resource that has many projects across a broad spectrum